package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    @Override
    public void remove(Long id) {
        // 查看Dish  是否存在
        LambdaQueryWrapper<Dish> lqw  = new LambdaQueryWrapper<>();
         lqw.eq(Dish::getCategoryId, id);
        int count = dishService.count(lqw);
        if (count==0){
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        LambdaQueryWrapper<Setmeal> lqw1 =new LambdaQueryWrapper<>();
        lqw1.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count(lqw1);
        if (count1==0){
            throw new CustomException("当前分类下关联了套餐，不能删除");//已经关联套餐，抛出一个业务异常
        }
        super.removeById("删除成功");
        }
    }

